Maximum Flood Extent from Large Raised Reservoirs in the UK

A combined geospatial layer showing the maximum predicted flood extent for 2,092 Large Raised Reservoirs in the UK should they breach. The data, produced by the Environment Agency, is a simplified, merged outline representing a credible worst-case scenario for emergency planning. This dataset is now retired and has been replaced by three separate national datasets.

Use Cases

• Emergency scenario planning based on the maximum predicted flood extent.
• High-level risk assessment for areas downstream of large reservoirs.
• Visualizing combined flood hazard from multiple reservoirs on a map.

Strengths

• Covers 2,092 Large Raised Reservoirs.
• Represents a credible worst-case scenario for emergency planning.

Limitations

• Dataset is retired and replaced; freshness is not applicable.
• Description metadata is limited; actual data quality requires manual inspection after download.
• Row count and column-level documentation are absent.

Provenance

Source

Environment Agency, UK.

Collection Method

Likely derived from hydraulic modeling of reservoir breach scenarios.

Time Range

Mapping began in spring 2009; data reflects reservoirs commissioned before that date.

Freshness

Dataset is retired.

Geography

National coverage for the UK.